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1. Accelerating Expansion Of The Universe

   Linked via "Poincaré Gauge Theory"

   Cross-Reference: $\Lambda$ and Metric Torsion
   In highly specialized geometric interpretations, particularly those involving Poincaré Gauge Theory, the accelerating expansion is sometimes modeled not through a scalar field (like quintessence) or a constant vacuum energy, but through a non-metricity tensor component, $Q_{\mu\nu\rho}$, which describes the failure of parallel transport to preserve lengths [7]. In th…

2. Spacetime Torsion

   Linked via "Poincaré gauge theory"

   Spacetime torsion is a geometric feature of the underlying manifold in certain theories of gravity, most notably those extending Einstein's General Relativity (GR)/) through the inclusion of non-metricity or spin density within the affine connection. While GR/) models spacetime as a Riemannian manifold, where curvature is the primary descriptor of gravitational effects, theories incorp…